diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index d8daa37..e8afc4a 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -46,7 +46,7 @@ jobs:
           - OptimalBranchingCore
           - OptimalBranchingMIS
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}
@@ -81,7 +81,7 @@ jobs:
       contents: write
       statuses: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: julia-actions/setup-julia@v2
         with:
           version: '1'